DESCRIPTION

The Cdk menu widget creates a pull-down menu list. The following are
functions which create or manipulate the Cdk menu widget.

AVAILABLE FUNCTIONS

activateCDKMenu
activates the menu widget and lets the user interact with the
widget. The parameter menu is a pointer to a non-NULL menu wid-
get. If the actions parameter is passed with a non-NULL value,
the characters in the array will be injected into the widget.
To activate the widget interactively pass in a NULL pointer for
actions. If the character entered into this widget is RETURN
then this then this function returns an integer which is a value
of the current menu list * 100 + the sub-menu number. It will
also set the widget data exitType to vNORMAL. If the character
entered into this widget was ESCAPE then the widget will return
a value of -1 and the widget data exitType will be set to
vESCAPE_HIT.
destroyCDKMenu
removes the widget from the screen and frees memory the object
used.
drawCDKMenu
draws the menu widget on the screen. If the box parameter is
true, the widget is drawn with a box.
drawCDKMenuSubwin
draws the menu item subwindow.
eraseCDKMenu
removes the widget from the screen. This does NOT destroy the
widget.
eraseCDKMenuSubwin
erases the menu item subwindow.
getCDKMenuCurrentItem
returns the values menuItem and submenuItem to the current menu
selection.
getCDKMenuSubTitleHighlight
returns the highlight attribute of the sub-menu selection bar.
getCDKMenuTitleHighlight
returns the highlight attributes of the menu title.
injectCDKMenu
injects a single character into the widget. The parameter menu
is a pointer to a non-NULL menu widget. The parameter character
is the character to inject into the widget. The return value
and side-effect (setting the widget data exitType) depend upon
the injected character:
RETURN or TAB
the function returns the current menu list * 100 + the
sub-menu number. The widget data exitType is set to
vNORMAL.
ESCAPE the function returns -1. to vESCAPE_HIT. The widget
data exitType is set to vESCAPE_HIT.
Otherwise
unless modified by preprocessing, postprocessing or key
bindings, the function returns -1. The widget data exit-Type is set to vEARLY_EXIT.
newCDKMenu
creates a menu widget and returns a pointer to it. Parameters:
screen
is the screen you wish this widget to be placed in.
menuList
is a list of the menu list titles.
menuListLength
is the number of pull down menus.
submenuListLength
is the number of menu items under each menu list.
menuLocation
tells where each menu is to be located. Valid values are
LEFT and RIGHT.
menuPos
tells whether the menu is to be on the top of the screen or
the bottom. Valid values are TOP and BOTTOM.
titleAttribute and
subtitleAttribute
are the character attributes of the title and sub-titles
respectively.
If the widget could not be created then a NULL pointer is
returned.
setCDKMenu
lets the programmer modify certain elements of an existing menu
widget. The parameters menuItem and submenuItem set which menu
list and sub-menu item are going to be highlighted when the wid-
get is activated. The other parameter names correspond to the
same parameter names listed in the newCDKMenu function.
setCDKMenuBackgroundAttrib
sets the background attribute of the widget. The parameter
attribute is a curses attribute, e.g., A_BOLD.
setCDKMenuBackgroundColor
sets the background color of the widget. The parameter color is
in the format of the Cdk format strings. See cdk_display(3).
setCDKMenuCurrentItem
sets the current item in the menu widget.
setCDKMenuPostProcess
allows the user to have the widget call a function after the key
has been applied to the widget. The parameter function is the
callback function. The parameter data points to data passed to
the callback function. To learn more about post-processing see
cdk_process(3).
setCDKMenuPreProcess
allows the user to have the widget call a function after a key
is hit and before the key is applied to the widget. The parame-
ter function is the callback function. The parameter data
points to data passed to the callback function. To learn more
about pre-processing see cdk_process(3).
setCDKMenuSubTitleHighlight
sets the highlight attribute of the sub-menu selection bar.
setCDKMenuTitleHighlight
sets the highlight attributes of the menu title.

KEY BINDINGS

When the widget is activated there are several default key bindings
which will help the user enter or manipulate the information quickly.
The following table outlines the keys and their actions for this wid-
get.
+----------------+-------------------------------------+
|Key | Action |
+----------------+-------------------------------------+
|Left Arrow | Highlights the menu list to the |
| | left of the current menu. |
+----------------+-------------------------------------+
|Right Arrow | Highlights the menu list to the |
| | right of the current menu. |
+----------------+-------------------------------------+
|Up Arrow | Moves the current menu selection up |
| | one. |
+----------------+-------------------------------------+
|Down Arrow | Moves the current menu selection |
| | down one. |
+----------------+-------------------------------------+
|Space | Moves the current menu selection |
| | down one. |
+----------------+-------------------------------------+
|Tab | Highlights the menu list to the |
| | right of the current menu. |
+----------------+-------------------------------------+
|Return | Exits the widget and returns the |
| | index of the selected item. This |
| | also sets the widget data exitType |
| | to vNORMAL. |
+----------------+-------------------------------------+
|Escape | Exits the widget and returns -1. |
| | This also sets the widget data |
| | exitType to vESCAPE_HIT. |
+----------------+-------------------------------------+
|Ctrl-L | Refreshes the screen. |
+----------------+-------------------------------------+